Make structural tagging functions available for both test and build
scripts.
Introduces the update_tag.sh helper for listing, checking, and updating
deterministic tags.
Also adds the ci_tag_build_time_check and ci_tag_test_time_check
functions to validate tags during build and test phases, ensuring
consistent component versioning.
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33421>